[...] two more Chinese swimmers had tested positive [...] but were cleared by Chinese officials
Ah, the old "we've investigated ourselves and found no wrong-doing"
At least try "we hired an outside agency, totally didn't bribe them, and they found no wrong-doing", or better yet "we totally didn't bribe the independent third party hired by someone else, and they found no wrong-doing".
But I suppose I should be glad it wasn't "we totally didn't aim veiled threats at someone's family and livelihood, etc."